Decorative lamp for a light string



FIG. 1 is a perspective view of the decorative lamp for a light string seen from its front showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left-hand side view thereof;

FIG. 7 is a right-hand side; and,

FIG. 8 is a top perspective view thereof, the lamp string being shown in broken lines for illustrative purposes only. 

The ornamental design for the decorative lamp for a light string, as shown and described. 